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However, your efforts un-pinning and re-pinning locks will be time well spent -- you will progress much faster than you would if you tried to start out picking fully pinned cylinders. While some of the literature of this subject is quite good, much of it is amateurish, apparently written to appeal to an "underground" audience and not especially rigorous or complete. While there are literally thousands of different keyways in commercial use in the United States and thousands more abroad, these four give a fairly representative sample of the different kinds of wardings (and pin manipulation problems) you are likely to encounter in common (non-high-security) locks. The keyways include Arrow ("AR1"), Ilco-Schlage-multiplex ("SX"), Schlage-C ("SC"), and Yale-8 ("Y1"). You'll probably want to use one of the smaller LAB picks, although the small Peterson hook will sometimes do with care and practice. This technique requires a great deal of practice to master, but has the surprising property of sometimes being more effective against better made locks.

Understanding the theory of lock picking is only a small part of being able to successfully pick locks. Few burglars can afford to risk exposure during the time required to pick even relatively easy locks, and unexplained possession of lock picking tools is often considered prima facia evidence of criminal intent. Raking, in contrast, is a class of picking techniques in which several pin stack may be set at the shear line simultaneously. See Figure 1. (In practice, the cuts are produced by stacking pin segments of particular lengths, not by actually cutting the pins; hence the term "pin stack.") With no key in the lock, all the pin stack cuts rest within the plug. And of course there is the surest and fastest method of all: the use of the correct key. There are many different styles of raking, some of which entail the use of special rake picks specifically designed for a particular technique.

For example, Medeco locks use special wedge-shaped bottom pins that are rotated into one of several possible positions by the key cuts (which can be cut at different angles). In what likely is the strangest, luckiest, most memorable ace to be witnessed by millions, Louis Oosthuizen made a hole in one at the Masters on Sunday with a trick shot. Unlike me though, Gramps jumps better than a kangaroo on a Pogo stick and is unlucky to have missed the shot in question. Oosthuizen’s seven-iron tee shot at Augusta National’s par-three 16th hole caught the bank above the flagstick and drifted toward the cup. See Figure 2. The plug will be blocked from rotating if any pin stack is lifted either not far enough (with the cut still in the plug below the shear line) or too far (with the cut pushed above the shear line and into the shell); to rotate, all pin stacks must have a cut at the shear line. The height (or cut depth) of a key under each pin stack position is called its bitting; the bitting of a key is the "secret" needed to open a lock.

Repeat until lock turns: - Locate the pin stack that's being pinched at the shear line (it resists slightly when pushed up) - Continue to push that pin stack up until its cut reaches the shear line and the plug turns slightly. The plug can rotate freely only if the key lifts every pin stack's cut to align at the border between the plug and shell. Other classes of attack, not discussed here but at least as worthy of study and scrutiny, include lock decoding, which is concerned with producing a working key based only on access to the external interface of the lock, lock bypass, which aims to unlatch the underlying locking mechanism without operating the lock at all, and forced entry, which, as the term suggests, involves the destructive application of force to the lock or its surroundings. It's aimed at working locksmiths, and has a broad discussion of picking techniques and principles, albeit with less depth than the Finch book.

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